A novel oil-in-water microemulsion as a cementation flushing fluid for removing non-aqueous filter cake

Neto, Alcides de Oliveira Wanderley; Silva, Valdic Luiz da; Rodrigues, Daniela Venâncio; Ribeiro, Laís Sibaldo; Silva, Daniel Nobre Nunes da; Freitas, Júlio Cézar de Oliveira

doi:10.1016/j.petrol.2019.106536

Cited by 25 publications

(14 citation statements)

References 24 publications

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“…In this method, the differential pressure is measured between two probes (capillaries immersed into the liquid) with different internal radii, where nitrogen (N 2 ) is flowed through the probes, creating a bubble inside the liquid. The surface tension is obtained using the Young-Laplace equation [35][36][37]. Droplet diameter and polydispersity measures were performed using the method of dynamic light scattering (DLS) in a drop size analyzer (ZetaPlus Equipment, Brookhaven Instruments, Holtsville, NY, USA).…”

Section: Acid Nanoemulsion Preparationmentioning

confidence: 99%

Investigating the Fluid–Solid Interaction of Acid Nonionic Nanoemulsion with Carbonate Porous Media

et al. 2020

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The subject of rock–fluid interaction is important in cases where flow through porous media is occurring. One special case is when the fluid reacts with the porous matrix. In this case, the mass transfer and reaction rate control the dissolution pattern. This article aimed to study the interaction between an acid nanoemulsion system and a carbonate porous media. Nanoemulsions were developed to retard the rock’s dissolution and to promote the formation of conductivity channels. Nanoemulsions were prepared using ALK100 (alkyl alcohol ethoxylate) and RNX110 (alkylphenol ethoxylate) (nonionic surfactants), sec-butanol (co-surfactant), xylene isomers (oil phase), and a solution of HCl (aqueous phase). The obtained systems were characterized in terms of surface tension, droplet diameter, and reactivity. X-ray fluorescence/diffraction (XRF/XRD) and X-ray microtomography (microCT) were performed on carbonate porous media samples treated with the acid systems in order to observe the effects of the fluid–rock interaction. The results showed that the acid nanoemulsion, presenting a low oil content formulation, showed the low surface tension and droplet size characteristic of nanoemulsions. It was experimentally verified that the reactivity in the nanoemulsion media was mass-transfer-retarded, and that the wormhole pattern was verified under the studied conditions.

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Section: Acid Nanoemulsion Preparationmentioning

confidence: 99%

Investigating the Fluid–Solid Interaction of Acid Nonionic Nanoemulsion with Carbonate Porous Media

et al. 2020

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“…The contact angle is considered the best method for analysing surface wettability and it accounts for the thermodynamic equilibrium between the fluid/rock system [23,24]. The adopted methodology was proposed by Wanderley Neto et al, 2019, Silva et al, 2020, and Dantas et al, 2014 [11,12,24]. The sandstone sample (plug) used in these experiments was from the Botucatu Formation (Paraná, Brazil).…”

Section: Wettability and Contact Angle Measurementmentioning

confidence: 99%

“…Due to the presence of the highly flammable solvent, contact with the environment can cause serious damage. Some studies have shown the application of microemulsions and nanoemulsions in removing the filter cake formed by non-aqueous drilling fluids [8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

“…These systems are considered thermodynamically stable, transparent, or translucent, with low interfacial tension, due to the presence of surfactant compounds at the oil/water interface [15,16]. Previous research has shown the application of microemulsions can be used as cleanup fluids: to solubilize the oil present in the drilling mud [17]; in the filter cake removal and wettability inversion [9][10][11][12][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

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Application of Microemulsion Systems in the Formulation of Biodegradable Pre-Flush Fluid for Primary Cementing

et al. 2020

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Oil well cleanup fluids (pre-flushes) are intermediate fluids pumped ahead of the cement slurry; they are able to clean the well walls by removing the filter cake formed by the drilling fluid, and leave the surface water-wet. This work’s main objective was to use biodegradable microemulsion systems as cleanup fluids in order to reduce the environmental impact. Three microemulsion systems were formulated, each composed of an oil phase, a surfactant and three different aqueous phases: glycerol, glycerol:water (mass ratio 1:1), and fresh water. The results show that all microemulsion systems were effective with 100% filter cake removal, with a removal time of less than 60 s. The wettability test and fluid compatibility analyses exhibited advantageous performances, without phase separation, variations in viscosity, gelation, or flocculation. The compressive strength and X-ray diffractometry (XRD) analysis showed the influence of the glycerol on the cement slurry properties, with the compressive strength resistance ranging from 8.0 to 10.7 MPa, and resulted in the formation of portlandite.

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“…Two reverse micelle formulations were chosen by the authors and both removed 100% of the filter cake in 207 s for the Tween 80 system and 120 s for the NP 150 system. In the works developed by Wanderley Neto et al (2020), the authors used microemulsified systems with dodecylammonium chloride (DAC), a cationic surfactant, and obtained 100% efficiency of filter cake removal using an oil-in-water system.…”

Section: Introductionmentioning

confidence: 99%

Application of SDS surfactant microemulsion for removal of filter cake of oil-based drilling fluid: influence of cosurfactant

Silva

Ribeiro²,

Freitas

et al. 2020

J Petrol Explor Prod Technol

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After drilling oil wells using oil-based drilling fluid, there is the occurrence of a formation of a thin layer of solids adsorbed on the surface, called filter cake, which must be removed to obtain satisfactory well cementation. The present work developed microemulsion systems from sodium dodecyl sulfate, a biodegradable surfactant, with kerosene as oil phase, n-butanol as cosurfactant and distilled water, in order to evaluate its efficiency in removing the filter cake. The results showed that the microemulsion systems composed of inverse and bicontinuous micelles removed 100% of the filter cake regardless of the content of the constituents in the formulation, while the direct micelles only reached 100% with the formulation composed by 10% kerosene and cosurfactant/surfactant ratio = 4. It was observed that the cosurfactant/surfactant ratio is a determining variable for direct micelles to remove 100% of the filter cake and that they are compatible with cement, offering desirable thermal stability and improving the wettability of the rock in water.

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A novel oil-in-water microemulsion as a cementation flushing fluid for removing non-aqueous filter cake

Cited by 25 publications

References 24 publications

Investigating the Fluid–Solid Interaction of Acid Nonionic Nanoemulsion with Carbonate Porous Media

Investigating the Fluid–Solid Interaction of Acid Nonionic Nanoemulsion with Carbonate Porous Media

Application of Microemulsion Systems in the Formulation of Biodegradable Pre-Flush Fluid for Primary Cementing

Application of SDS surfactant microemulsion for removal of filter cake of oil-based drilling fluid: influence of cosurfactant

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